Using Hannover is very un-British like, since you are willing to go to Firenze rather than Florence, how do you feel about Wien/Vienna, Praha/Prague, Koln/Cologne, Kobenhavn/Copenhagen? Writing and editing reference works we wrestle with this problem daily, but we tend to find most US readers are very reluctant to change even when we point out that in this century Tokio has become Tokyo and Porto Rico even changed its own spelling to Puerto Rico as did Pittsburgh, PA. For several years it lacked its h. My argument is that in a truly unified world of fairly easy access, one should use the spelling preferred by the locality. But I tend to lose this battle.Michael Keyton